[Jewelry making - Article 00260] - [Orchid] Ring Sizing Issues Again

[Dan Statman]

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    I am having some trouble finding a definitive source for ring sizes.
     I only make titanium rings and they are precision machined from
    solid bar stock to the exact inside diameter of the rings.  Of
    course, nobody measures rings via the inside diameter (or at least
    few people do).  For the most part the sizing charts all agree on the
    inside diameter of various sizes and the different scales used for
    American, British, Japanese, etc. 

    However, lately I have been having trouble with a jewelry store in
    London, England.  They have been ordering rings in British sizes and
    the larger the size, the more off I am on the fit.  Apparently the
    charts I am using are incorrect, and they have been instructed to
    order all rings via specifying the actual inside diameter to the
    thousandth of an inch or hundredth of a millimeter.  This works fine
    for them.  Now I have some orders for other British customers and
    they have given me their British sizes.  Here are two sizing charts
    with two different values for a British size "X" inside diameter. 

    http://www.geocities.com/fsubrides/page57.html 

    http://www.niceice.com/ring_sizes.htm 

    One has it at 0.830" and the other at 0.841", this is an
    unacceptable variation to me.  What is the "real" value for British
    conversions? 

Daniel J. Statman, Statman Designs
www.statmandesigns.com
dan.statman AT rennlist.com


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